TM1814B from TM Shenzhen Titan Micro Elec, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	OUTR	output	Red-channel constant-current output. Open-drain N-MOS sink, up to 32V standoff when OFF, programmable constant-current sink 6.5 mA to 38 mA (64 steps) with 256-level PWM dimming.
2	OUTG	output	Green-channel constant-current output. Open-drain N-MOS sink, up to 32V standoff when OFF, programmable constant-current sink 6.5 mA to 38 mA (64 steps) with 256-level PWM dimming.
3	OUTB	output	Blue-channel constant-current output. Open-drain N-MOS sink, up to 32V standoff when OFF, programmable constant-current sink 6.5 mA to 38 mA (64 steps) with 256-level PWM dimming.
4	GND	power_in	Ground / power return.
5	DO	output	Single-wire cascade data output. Regenerated/reshaped copy of DIN forwarded to the next TM1814B in the chain; recommend 100 ohm series resistor for hot-plug ESD protection.
6	DIN	input	Single-wire cascade data input. 800 kHz NRZ-encoded protocol; Vih >= 3.5V @ VDD=5V. Recommend 100 ohm series resistor for hot-plug ESD protection.
7	VDD	power_in	Logic supply, 4.5-6.5V recommended (5V typical). Internal 5V shunt regulator allows operation from 6-24V rail via series resistor R=(Vdc-5.5V)/10mA; a 104 (100 nF) and 105 (1 uF) decoupling network is recommended close to the pin.
8	OUTW	output	White-channel constant-current output. Open-drain N-MOS sink, up to 32V standoff when OFF, programmable constant-current sink 6.5 mA to 38 mA (64 steps) with 256-level PWM dimming.

Key specifications

Parameter	Value
Manufacturer	TM Shenzhen Titan Micro Elec
Package	SOP-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: TM1814B
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`tm1814b.step`	122 KB	You want the bare part, or you mark your own boards.
`tm1814b-etched.step`	1.5 MB	You want the part with `TM1814B` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 385 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: TM Shenzhen Titan Micro Elec datasheet (9 pp, sha256 41a5a4b57dd8bd8f, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF